On 10/14/2015 12:22 PM, Frederik Bayart wrote:
> Hallo,
> I'm using xenomai 3.0 on kernel 3.18.20 (64 bit).
>
> When using single block heap, I'm getting memory allocation problem when
> calling rt_heap_alloc with size 0. I don't get the error when calling the
> function with size used in rt_heap_create.
> On the mailing list, I found there has been an issue with this in May :
> http://www.xenomai.org/pipermail/xenomai/2015-May/034165.html
> Is this still an issue ?
No, this one is long gone.
>
> In attachment a test program htest.c + makefile to generate the problem :
>
> $ sudo ./htest 1 ==> use 0
> htest.c:69: heapsize = 70000, usablemem = 70144, usedmem = 0
> htest.c:79 ERROR: rt_heap_alloc(-12): Cannot allocate memory
>
> $ sudo ./htest 1 ==> use same size as in create
> htest.c:69: heapsize = 70000, usablemem = 70144, usedmem = 0
> htest.c:92: heapsize = 70000, usablemem = 70144, usedmem = 70144
>
Does this help?
diff --git a/lib/alchemy/heap.c b/lib/alchemy/heap.c
index 20531e3..146bfa1 100644
--- a/lib/alchemy/heap.c
+++ b/lib/alchemy/heap.c
@@ -442,7 +442,9 @@ int rt_heap_alloc_timed(RT_HEAP *heap,
p = __mptr(hcb->sba);
if (p)
goto done;
- if (size > 0 && size != hcb->size) {
+ if (size == 0)
+ size = heapobj_size(&hcb->hobj);
+ else if (size != hcb->size) {
ret = -EINVAL;
goto done;
}
> However, I both cases, I get a trace in dmesg :
>
> [Xenomai] syscall <7> denied to sysregd
>
That one is a different issue. Does your application have supervisor or
user privileges?
--
Philippe.
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